HP Fibre Channel Fabric Migration Guide

Fabric Migration Guide
Fabric Device Addressing Changes
Chapter 1 19
Class I H/W Path Driver S/W State H/W Type Description
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fc 0 0/1/2/0 td CLAIMED INTERFACE HP Tachyon
TL/TS Fibre Channel Mass Storage Adapter
fcp 1 0/1/2/0.1 fcp CLAIMED INTERFACE FCP Domain
ext_bus 3 0/1/2/0.1.19.0.0 fcparray CLAIMED INTERFACE FCP Array
Interface
target 6 0/1/2/0.1.19.0.0.0 tgt CLAIMED DEVICE
disk 3 0/1/2/0.1.19.0.0.0.0 sdisk CLAIMED DEVICE HP OPEN-8
/dev/dsk/c4t0d0 /dev/rdsk/c4t0d0
disk 10 0/1/2/0.1.19.0.0.0.7 sdisk CLAIMED DEVICE HP OPEN-8
/dev/dsk/c4t0d7 /dev/rdsk/c4t0d7
target 7 0/1/2/0.1.19.0.0.1 tgt CLAIMED DEVICE
disk 18 0/1/2/0.1.19.0.0.1.7 sdisk CLAIMED DEVICE HP OPEN-9
/dev/dsk/c4t1d7 /dev/rdsk/c4t1d7
Looking at the iotree examples, you can see the following:
• There has been no change to the adapter path or the associated
device file which is used for the fcmsutil diagnostic tool.
•The node 0/1/2/0.8, FCP Protocol Adapter, is in the first ioscan
output file. In a private loop configuration, the interface and target
devices will reside behind this node. In a fabric environment, this
node may be created as a dummy node generated by the scan logic if
the HBA is scanned when it cannot see the fabric (for example, no
cable attached, switch down, etc.).
In the original Private Loop implementation of the Fibre Channel
driver, this node of the iotree was used to indicate the Fibre Channel
FC4 “TYPE”. A type of “8” denotes that the FCP protocol is being
used to encapsulate the SCSI protocol. With the introduction of
fabric, this node contains the domain portion of the N_Port address.
To maintain backward compatibility, the domain of 8 is reserved for
use with Private Loop devices.
CAUTION Do not configure switches with a domain of 8. This configuration is
unsupported and will not work. HP systems reserve domain 8 for
Private Loop devices.